Tungsten Carbide Valve Ball Description (2/2)

In some deep oil well with high content of water and sand, high abrasion, the advantages of high density, excellent wear resistance and corrosion resistance of tungsten carbide valve ball becomes more obvious. Theoretically, the main failure modes include wearing, abrasion, fatigue cracks, collapse and so on, which makes the ball valve material fail earlier in oil drilling (such as bearing steel, ceramics) and shorten the service life (bearing steel is easily corroded by the liquid and has lower wear resistance; ceramics belongs to brittle materials and has lower impact ductility, which is easily to break).

Therefore, tungsten carbide valve ball makes up for the deficiency perfectly, which not only has high hardness, high density, high strength, excellent chemical stability of tungsten (W), but also remarkably improves the bending strength and impact ductility of oil drilling pump valve ball by adding cobalt (Co). Excellent resistance to wear and corrosion resistance greatly improved drilling efficiency, extend tool life, but also reduces operating costs. Recent years, the related researchers and scholars will further shift the focus to the cemented carbide valve ball, especially in the United States and some European industrial countries, tungsten carbide valve ball has been increasingly widely used, the type and quantity are continuing to increase, and toward the high temperature and pressure, high tightness, large-caliber, long service life and multifunction developing. The reliability and overall performance have reached a higher level, has been replaced with a valve part, control valve and end valve. In addition, with the innovation of tungsten carbide valve ball technology, it has a broader applying prospect in oil and gas pipelines, refinery cracker and nuclear industry, especially in medium and large caliber, medium and high pressure fields.

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